It has been 24 days to build a 4,500-meter-long road, with an average of 185 meters per day. How much rice is left?
修一条长4500米的路，已经修了24天，平均每天修185米．还剩下多少米？
<gadget id="calculator">24 * 185</gadget>
<output>4_440</output>

<gadget id="calculator">4_500 - 4_440</gadget>
<output>60</output>

<result>60</result>