A batch of coal, a truck transports 8 tons each time, and after 16 shipments, there are still 42 tons left. How many tons are there in this batch of coal?
一批煤，一辆货车每次运8吨，运了16次后还剩42吨，这批煤一共有多少吨？
<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<gadget id="calculator">128 + 42</gadget>
<output>170</output>

<result>170</result>