A piece of iron wire is 8 decimeters long, and 35 centimeters are used up, how many centimeters are left?
一根铁丝长8分米，用去35厘米，还剩多少厘米？
<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<gadget id="calculator">80 - 35</gadget>
<output>45</output>

<result>45</result>