A factory shipped 286 tons of coal, and used an average of 15 tons per day in the first 6 days. The rest is estimated to be used up in 8 days, how many tons can be used per day on average?
某工厂运来286吨煤，前6天平均每天用去15吨．剩下的预计8天用完，平均每天可用多少吨？
<gadget id="calculator">6 * 15</gadget>
<output>90</output>

<gadget id="calculator">286 - 90</gadget>
<output>196</output>

<gadget id="calculator">196 / 8</gadget>
<output>49/2 = around 24.5</output>

<result>49/2 = around 24.5</result>