Jerry mows 8 acres of lawn each week. He mows ¾ of it with a riding mower that can cut 2 acres an hour. He mows the rest with a push mower that can cut 1 acre an hour. How long does Jerry mow each week?
Jerry mows 8 acres x 3/4 = 6 acres with a riding mower.
It will take him 6 acres / 2 each hour = 
<gadget id="calculator">6/2</gadget>
<output>3</output>
3 hours.
Jerry mows 8 acres - 6 acres mowed with a riding mower = 
<gadget id="calculator">8-6</gadget>
<output>2</output>
2 acres with a push mower.
It will take him 2 acres x 1 hour = 
<gadget id="calculator">2*1</gadget>
<output>2</output>
2 hours.
It takes Jerry a total of 3 hours on the riding mower + 2 hours on the push mower = 
<gadget id="calculator">3+2</gadget>
<output>5</output>
5 hours.

<result>5</result>