A bundle of wires is 80 meters long and weighs 10 kg. 12 meters are used for the first time, and 5 kilograms are used for the second time, how many meters are left?
一捆电线长80米，共重10千克．第一次用去12米，第二次用去5千克，还剩多少米．
<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">40 + 12</gadget>
<output>52</output>

<gadget id="calculator">80 - 52</gadget>
<output>28</output>

<result>28</result>