40% of the number A is equal to the number B, what is the minimum sum of the two numbers A and B?
甲数的40%和乙数相等，甲、乙两数的和最小是多少．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">0 * (2/5)</gadget>
<output>0</output>

<gadget id="calculator">0 + 0</gadget>
<output>0</output>

<result>0</result>