The edge length of the big block is 15 cm, and the edge length of the small block is 3 cm. How many small blocks are needed to make the same volume as one big block?
大积木棱长15厘米，小积木棱长3厘米，如果要用小积木堆成和一个大积木相同体积需要多少个小积木．
<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">15 / 27</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">15 * 15 * (5/9)</gadget>
<output>125</output>

<result>125</result>