Buy two kinds of pencils, A and B, totaling 220 pieces. Each pencil of type A is 0.2 yuan, and each pencil of type B is 0.24 yuan. The money spent on buying the two kinds of pencils is the same. How many pencils did you buy?
买甲、乙两种铅笔共220支，甲种铅笔每支0.2元，乙种铅笔每支0.24元，买两种铅笔用去的钱相同．问乙种铅笔买了多少支？
<gadget id="calculator">0.24 * 220</gadget>
<output>52.8</output>

<gadget id="calculator">0.2 + 0.24</gadget>
<output>0.44</output>

<gadget id="calculator">52.8 / 0.44</gadget>
<output>120</output>

<gadget id="calculator">220 - 120</gadget>
<output>100</output>

<result>100</result>