If he has 24 bags and each is 25 pounds, you need to multiply:
24x25=600
Steven bought 600 pounds of flour.
The picture will now be 7.5 inches high by 18 inches wide.
10 times as many as a number is 10 × the number.
10 times as many as 1 ten is 10 × 10 = 100
10 times as many as 1 hundred is 10 × 100 = 1000
Therefore, 10 times as many as 1 hundred is 10 hundreds or
10 times as many as 1 hundred is one thousand.