The original area of a playground is 0.078 hectares, and now its area is expanded to 10 times the original area, how many square meters is the current area?
一个游乐场原来的面积是0.078公顷，现在把它的面积扩大到原来的10倍，现在的面积有多少平方米？
<gadget id="calculator">0.078 * 10_000</gadget>
<output>780</output>

<gadget id="calculator">780 * 10</gadget>
<output>7_800</output>

<result>7_800</result>