There are three numbers, the sum of B and C (1/3) is equal to the number A, the number A is 60, and the number A is the average of these three numbers.
有三个数，乙、丙二数之和的(1/3)等于甲数，甲数是60，甲数是这三个数平均数的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">60 / (1/3)</gadget>
<output>180</output>

<gadget id="calculator">180 + 60</gadget>
<output>240</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">60 / 80</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>