A piece of iron wire is 120cm long. Use it to form a rectangle with a length of 16cm and a width of 9cm. How many centimeters of iron wire are left?
一根铁丝长120cm，用它围成一个长16cm，宽9cm的长方形，还剩多少厘米铁丝．
<gadget id="calculator">16 + 9</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">120 - 50</gadget>
<output>70</output>

<result>70</result>