The school has 18 soccer balls, volleyballs (2/3) and basketballs (2/5). How many basketballs are there?
学校有足球18个，排球的个数是足球的(2/3)，又是篮球的(2/5)，篮球有多少个？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) / (2/5)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">18 * (5/3)</gadget>
<output>30</output>

<result>30</result>