Question: The Battle of Prokhorovka was part of the larger engagement on the city how far from Moscow?
Context: The Battle of Prokhorovka was fought on 12 July 1943 near Prokhorovka, 87 km southeast of Kursk in the Soviet Union, during the Second World War.  Taking place on the Eastern Front, the engagement was part of the wider Battle of Kursk, and occurred when the 5th Guards Tank Army of the Soviet Red Army attacked the II SS-Panzer Corps of the German Wehrmacht in one of the largest tank battles in military history. The Second Battle of Algeciras (also known as the Battle of the Gut of Gibraltar) was a naval battle fought on the night of 12 July 1801 (23 messidor an IX of the French Republican Calendar) between a squadron of British Royal Navy ships of the line and a larger squadron of ships from the Spanish Navy and French Navy in the Gut of Gibraltar.  The battle followed closely the First Battle of Algeciras on 6 July, in which a French squadron anchored at the Spanish port of Algeciras was attacked by a larger British squadron based at nearby Gibraltar.  In a heavy engagement fought in calm weather in the close confines of Algeciras Bay, the British force had been becalmed and battered, suffering heavy casualties and losing the 74-gun ship HMS "Hannibal".  Retiring for repairs, both sides called up reinforcements, the French receiving support first, from the Spanish fleet based at Cadiz, which sent six ships of the line to escort the French squadron to safety. The Battle of Khushab (Battle of Khoosh-Ab) took place on 7 February 1857 and was the largest single engagement of the Anglo-Persian War.  Having taken Borazjan without a fight, the British expeditionary army under Sir James Outram was in the process of withdrawing to Bushehr when it was ambushed by a far larger Persian force under Khanlar Mirza, drawn up in battle order to its rear. The Harris Farm Engagement was a military engagement between the Union Army and the Confederate States Army.  The Harris Farm Engagement was a part of the Battle of Spotsylvania Courthouse.  The battle was led by Union Major General Winfield S. Hancock and Confederate general Richard S. Ewell.  The battle was caused when the Union commander, Lt. Gen. Ulysses S. Grant ordered Hancock's Union II Corps to trap Confederate soldiers between Richmond and Fredericksburg.  Before General Hancock could trap the Confederate soldiers, Confederate General Robert E. Lee ordered Lieutenant General Richard S. Ewell, in command of the "Confederate "II Corps to ambush General Hancock's troops at the Harris Farm (also known as Bloomsbury Farm). The Battle of North Point was an engagement in the War of 1812, fought on September 12, 1814, between Brigadier General John Stricker's Third Brigade (Baltimore City Brigade) of the Maryland State Militia and a British landing force, composed of units from the King's Army (British Army), Royal Navy seamen, Colonial Marines, Royal Marines, and led by Major General Robert Ross and Rear Admiral George Cockburn.  The events and result of the engagement, a part of the larger Battle of Baltimore, saw the U.S. forces retreating after having inflicted heavy casualties on the British. The Battle of Gloucester Point, Virginia was an inconclusive exchange of cannon fire between a shore battery on the York River which was manned by Virginia (soon to be Confederate) forces and the Union gunboat USS "Yankee".  The action occurred on May 7, 1861, three weeks after the start of the American Civil War (Civil War) at Fort Sumter in the harbor at Charleston, South Carolina on April 14, 1861.  The Gloucester Point engagement is notable as the earliest exchange of gunfire between the Union Navy and organized Rebel (Confederate) forces after the U.S. Army surrendered Fort Sumter to the Confederates and as the earliest reported Civil War military engagement in Virginia.  Like other early engagements between Union gunboats and Confederate shore batteries, the battle at Gloucester Point was part of the Union Navy effort to blockade the Southern States in general and the Chesapeake Bay in particular.  The engagement also was part of the effort by Confederate forces to deny the use of rivers in Virginia to Union military and commercial traffic. The frigate action of 29 May 1794—not to be confused with the much larger fleet action of 29 May 1794 that took place in the same waters at the same time—was a minor naval engagement of the French Revolutionary Wars between a Royal Navy frigate and a French Navy frigate.  The action formed a minor part of the Atlantic campaign of May 1794, a campaign which culminated in the battle of the Glorious First of June, and was unusual in that the French ship "Castor" had only been in French hands for a few days at the time of the engagement.  "Castor" had previously been a British ship, seized on 19 May by a French battle squadron in the Bay of Biscay and converted to French service while still at sea.  While the main fleets manoeuvered around one another, "Castor" was detached in pursuit of a Dutch merchant ship and on 29 May encountered the smaller independently cruising British frigate HMS "Carysfort". The 9th Guards Airborne Division was formed on 15 December 1942 in the Moscow Military District from the 204th and 211th Airborne Brigades and the 1st Maneuver Airborne Brigade of 1st Airborne Corps.  In February 1943, it became part of the 1st Shock Army.  Beginning on 12 March 1943, the division fought in the Staraya Russa Offensive Operation.  After the end of the Starayarussa Operation, the division was transferred to Reserve of the Supreme High Command ("Stavka" reserve) and in May was transferred to the 5th Guards Army of the Steppe Front.  During July and August, the 9th Guards Airborne fought in the Battle of Kursk.  They were particularly distinguished during the defence of Prokhorovka, where they repulsed German counterattacks by the Leibstandarte.  As part of the 33rd Guards Rifle Corps, the division participated in the Belgorod-Khar'kov Offensive Operation. The Battle of Kursk was a Second World War engagement between German and Soviet forces on the Eastern Front near Kursk (450 km south-west of Moscow) in the Soviet Union during July and August 1943.  The battle began with the launch of the German offensive, Operation Citadel (German: "Unternehmen Zitadelle" ), on 5 July, which had the objective of pinching off the Kursk salient with attacks on the base of the salient from north and south simultaneously.  After the German offensive stalled on the northern side of the salient, on 12 July the Soviets commenced their Kursk Strategic Offensive Operation with the launch of Operation Kutuzov (Russian: Кутузов ) against the rear of the German forces in the northern side.  On the southern side, the Soviets also launched powerful counterattacks the same day, one of which led to a large armoured clash, the Battle of Prokhorovka.  On 3 August, the Soviets began the second phase of the Kursk Strategic Offensive Operation with the launch of Operation Polkovodets Rumyantsev (Russian: Полководец Румянцев ) against the German forces in the southern side of the Kursk salient. The 2nd SS Panzer Division "Das Reich" was a division of the Nazi Waffen-SS during World War II.  It was one of the thirty-eight divisions fielded by the Waffen-SS.  "Das Reich" served during the invasion of France and took part in several major battles on the Eastern Front, including in the Battle of Prokhorovka against the 5th Guards Tank Army at the Battle of Kursk.  It was then transferred to the West and took part in the fighting in Normandy and the Battle of the Bulge, ending the war in Hungary and Austria.  "Das Reich" committed the Oradour-sur-Glane and Tulle massacres.
Answer: 450 km