The number A is 100, the number B is 60% of the number A, and the number C is 50% of the number A. What is the average of these three numbers?
甲数是100，乙数是甲数的60%，丙数是甲数的50%，这三个数的平均数是多少．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">100 * (3/5)</gadget>
<output>60</output>

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

<gadget id="calculator">100 * (1/2)</gadget>
<output>50</output>

<gadget id="calculator">100 + 60 + 50</gadget>
<output>210</output>

<gadget id="calculator">210 / 3</gadget>
<output>70</output>

<result>70</result>