A candle is 1 decimeter and 2 centimeters long, and 7 centimeters are left after burning. How many centimeters are burned?
一根蜡烛长1分米2厘米，点燃后还剩7厘米，燃去了多少厘米．
<gadget id="calculator">12 - 7</gadget>
<output>5</output>

<result>5</result>