There are 32 coins of 1 yuan and 5 cents in Xiaohong's piggy bank, totaling 20 yuan. Then how many pieces are there with 5 corners?
小红的存钱罐里有1元和5角的硬币32枚，共有20元．则5角的有多少枚．
<gadget id="calculator">1 * 32</gadget>
<output>32</output>

<gadget id="calculator">32 - 20</gadget>
<output>12</output>

<gadget id="calculator">1 - 0.5</gadget>
<output>0.5</output>

<gadget id="calculator">12 / 0.5</gadget>
<output>24</output>

<result>24</result>