Use a batch of tiles with a length of 45cm and a width of 30cm to lay a square, at least how many tiles are needed.
用长为45cm，宽为30cm的一批瓷砖，铺成一块正方形，至少需要多少块．
<gadget id="calculator">2 * 3 * 3 * 5</gadget>
<output>90</output>

<gadget id="calculator">45 * 30</gadget>
<output>1_350</output>

<gadget id="calculator">90 / 1_350</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">90 * (1/15)</gadget>
<output>6</output>

<result>6</result>