The reciprocal of the number A is (3/5), and the number B is three times the number A, what is 50% of the sum of the numbers A and B?
甲数的倒数是(3/5)，乙数是甲数的3倍，甲、乙两数的和的50%是多少．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) * 3</gadget>
<output>5</output>

<gadget id="calculator">(5/3) + 5</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(20/3) * (1/2)</gadget>
<output>10/3 = around 3.333333</output>

<result>10/3 = around 3.333333</result>