Question: 36 liters of diesel fuel is worth 18. The tank of this pickup truck can hold 64 liters. How much does a full tank of diesel fuel cost?
Answer: A liter of diesel costs 18 / 36 = 0.5 . 64 liters of diesel fuel cost 0.5 X 64 = 32 . The answer is 32.

Question: Shawn collected 40 plain pebbles. He painted 9 pebbles red and 13 pebbles blue. He then divided the remaining pebbles equally into 3 groups, and painted them purple, yellow, and green. What is the difference between the number of blue and yellow pebbles?
Answer: After painting the red and blue pebbles, Shawn had a remainder of 40 - 9 - 13 = 18 pebbles. He painted 18 / 3 = 6 pebbles yellow. The difference between the number of blue and yellow pebbles is 13 - 6 = 7. The answer is 7.

Question: The total mask production was doubled every month by a company after the outbreak of Coronavirus due to increased demand. If the company produced 3000 masks in March, calculate the total mask production of July.
Answer: If in March the company produced 3000 masks, in April, after doubling the total mask production, the company produced 3000 * 2 = 6000 masks. In May, the company doubled its total mask production to 2 * 6000 = 12000. After doubling the production for June, the company was able to produce 2 * 12000 = 24000. By July, the company was producing a total of 2 * 24000 = 48000 masks. The answer is 48000.

Question: Mark made a chalkboard that is 3 feet wide. It is 2 times as long as it is wide. What is the area of the chalkboard?
Answer:
The length of the chalkboard is 2 x the width of 3 feet = 6 feet. We can calculate area by multiplying the width and the length, so 3 feet x 6 feet = 18 feet. The answer is 18.