The number A is (1/4) of the number B, so what fraction is the number A of the sum of the two numbers of A and B?
甲数是乙数的(1/4)，则甲数是甲乙两数和的几分之几？
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>