The ratio of the numbers A and B is 2:5, how much less is the number A than the number B
甲、乙两数的比是2：5，甲数比乙数少多少
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>