The former term of the ratio is expanded by 2 times, and the latter term of the ratio remains unchanged, how many times the ratio is enlarged
比的前项扩大2倍，比的后项不变，比值扩大多少倍
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<result>2</result>