Xiaogang's home is 1 kilometer away from the school, and he has already walked 392 meters. How many more meters do he have to walk?
小刚家离学校有1千米，已经行了392米，还要行多少米？
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 392</gadget>
<output>608</output>

<result>608</result>