Rocco stores his coins in piles of 10 coins each. He has 4 piles of quarters, 6 piles of dimes, 9 piles of nickels, and 5 piles of pennies. How much money does Rocco have?
Each pile has 10 coins, so he has:
10 * 4 * $.25 = $
<gadget id="calculator">10*4*.25</gadget>
<output>10</output>
10.00 worth of quarters,
10 * 6 * $.10 = $
<gadget id="calculator">10*6*.10</gadget>
<output>6</output>
6.00 worth of dimes,
10 * 9 * $.05 = $
<gadget id="calculator">10*9*.05</gadget>
<output>4.5</output>
4.50 worth of nickels, and
10 * 5 * $.01 = $
<gadget id="calculator">10*5*.01</gadget>
<output>0.5</output>
0.50 worth of pennies.
Altogether he has $10.00 + $6.00 + $4.50 + $0.50 = $
<gadget id="calculator">10+6+4.5+0.5</gadget>
<output>21</output>
21.00.

<result>21</result>