A piece of wood with a length of 4 meters is sawn 35 decimeters, how many decimeters are left
一根长4米的木料，锯了35分米，还剩多少分米
<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">40 - 35</gadget>
<output>5</output>

<result>5</result>