A pile of coal is planned to transport 15 tons per day, and it can be transported in 8 days. If only 2/3 of the plan is transported every day, how many days can it be transported?
一堆煤计划每天运15吨，8天可以运完，如果每天只运计划的(2/3)，那么几天才能运完？
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">15 * (2/3)</gadget>
<output>10</output>

<gadget id="calculator">120 / 10</gadget>
<output>12</output>

<result>12</result>