The average of the two numbers of A and B is 70, A's number is 75% of B's number, what is A's number?
甲乙两数的平均数是70，甲数是乙数的75%，甲数是多少？
<gadget id="calculator">70 * 2</gadget>
<output>140</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">140 / (7/4)</gadget>
<output>80</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>