Roger was putting his spare change into piles. He had 3 piles of quarters and 3 piles of dimes. If each pile had 7 coins in it, how many coins did he have total?
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<result>42</result>