The number of A is 40% less than the number of B, and the number of B is 200. What is the number of armor?
甲数比乙数少40%，乙数是200．甲数是多少？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">200 * (3/5)</gadget>
<output>120</output>

<result>120</result>