Xiaohua bought two bottles of juice, the small bottle is 500ml, which happens to be the big bottle (2/5), how many milliliters is the big bottle? (solution by equation)
小华买了两瓶果汁，小瓶有500毫升，正好是大瓶的(2/5)，大瓶有多少毫升？(用方程解)
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">500 / (2/5)</gadget>
<output>1_250</output>

<result>1_250</result>