piece of wood is 3 meters long, 8 decimeters are sawed off for the first time, and 2 decimeters are sawed off for the second time, how many meters is the length of the wood shortened?
一根木头长3米，第一次锯掉8分米，第二次锯掉2分米，木头短了多少米．
<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<result>1</result>