A car and a truck with a hanging bucket transport a pile of coal. The truck can hold 6 tons of coal, and the coal loaded in the hanging bucket is exactly half of the truck’s load. It takes 15 times to transport this pile of coal. How many tons is this pile of coal ?
一辆带挂斗的车和卡车运一堆煤，卡车能装6吨，挂斗装的煤正好是卡车装的一半，运了15次才把这堆煤运走，这堆煤有多少吨？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">6 + 3</gadget>
<output>9</output>

<gadget id="calculator">9 * 15</gadget>
<output>135</output>

<result>135</result>