Given the task definition and input, reply with output. This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

Passage: On 2 June 1611 Smolensk had finally fallen to the Poles. After enduring 20 months of siege, two harsh winters and dwindling food supplies, the Russians in Smolensk finally reached their limit as the Polish-Lithuanian troops broke through the city gates. The Polish army, advised by the runaway traitor Andrei Dedishin, discovered a weakness in the fortress defenses, and on 13 June 1611 Cavalier of Malta Bartomiej Nowodworski inserted a mine into a sewer canal. The explosion created a large breach in the fortress walls. The fortress fell on the same day.:563 The remaining 3,000 Russian soldiers took refuge in the Assumption Cathedral and blew themselves up with stores of gunpowder to avoid death at the hands of the invaders.:563 Although it was a blow to lose Smolensk, the defeat freed up Russian troops to fight the Commonwealth in Moscow, and the Russian commander at Smolensk, Mikhail Borisovich Shein, was considered a hero for holding out as long as he had. He was captured at Smolensk and remained a prisoner of Poland-Lithuania for the next nine years.
How many days after Smolensk had finally fallen to the Poles did Nowodworski insert a mine into a sewer canal?