The number of A is 420, which is more than the number of B (1/6). What is the B number?
甲数是420，比乙数多(1/6)．乙数是多少？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">420 / (7/6)</gadget>
<output>360</output>

<result>360</result>