Martha's cat is 5 times faster than her turtle. If the cat can run 15 feet/second, how many feet can her turtle crawl in 40 seconds?
First find the speed of the turtle by dividing the cat's speed by 5: 15 feet/second / 5 = 
<gadget id="calculator">15/5</gadget>
<output>3</output>
3 feet/second.
Then multiply the turtle's speed by the number of seconds it spends crawling to find how far it crawls: 40 seconds * 3 feet/second = 
<gadget id="calculator">40*3</gadget>
<output>120</output>
120 feet.

<result>120</result>