The first pile of coal weighs 20 tons, which is 4 tons less than the second pile of coal (2/3). How many tons does the second pile of coal weigh? (solution by equation)
第一堆煤重20吨，比第二堆煤的(2/3)少4吨，第二堆煤重多少吨？(用方程解)
<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">24 * (3/2)</gadget>
<output>36</output>

<result>36</result>