The living room of Xiaoming’s house is 64m**2. If you use floor tiles with a side length of 80cm, each piece is 78 yuan. How much will it cost?
小明家客厅64m**2，如果用边长80cm的地砖铺，每块78元，一共需要多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * (4/5)</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">64 / (16/25)</gadget>
<output>100</output>

<gadget id="calculator">100 * 78</gadget>
<output>7_800</output>

<result>7_800</result>