Tommy is looking at his change collection. He has 10 more dimes than pennies. He has twice as many nickels as dimes. He has 4 quarters. He has 10 times as many pennies as quarters. How many nickels does he have?
Tommy has 40 pennies because 10 x 4 = 
<gadget id="calculator">10*4</gadget>
<output>40</output>
40.
Tommy has 50 dimes because 40 + 10 = 
<gadget id="calculator">40+10</gadget>
<output>50</output>
50.
Tommy has 100 nickels because 50 x 2 = 
<gadget id="calculator">50*2</gadget>
<output>100</output>
100.

<result>100</result>