The sum of the two numbers of A and B is 70. If the decimal point of A is moved to the left by one bit, it is equal to (1/4) of B. What is the number of A?
甲乙两个数的和是70，甲的小数点向左移动一位就等于乙的(1/4)，甲数是多少．
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">70 * (5/7)</gadget>
<output>50</output>

<result>50</result>