The average of the two numbers of A and B is 80, A is 60% of B, what is A?
甲乙两数的平均数是80，甲是乙的60%，甲是多少．
<gadget id="calculator">60 + 100</gadget>
<output>160</output>

<gadget id="calculator">60 / 160</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">80 * 2 * (3/8)</gadget>
<output>60</output>

<result>60</result>