The salinity rate of Qinghai Lake is 16%, how many tons of Qinghai Lake's salt content is 4 tons.
青海湖的湖水含盐率是16%，多少吨青海湖的湖水含盐4吨．
<gadget id="calculator">16 / 100</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">4 / (4/25)</gadget>
<output>25</output>

<result>25</result>