if a man lost 7 % by selling oranges at the rate of 21 a rupee at how many a rupee must he sell them to gain 42 %?  Choose the correct answer.
A) 12.75 B) 11.75 C) 8.75 D) 15.75 E) 13.75
<gadget id="calculator">100 - 7</gadget>
<output>93</output>

<gadget id="calculator">93 * 21</gadget>
<output>1_953</output>

<gadget id="calculator">100 + 42</gadget>
<output>142</output>

<gadget id="calculator">1_953 / 142</gadget>
<output>1_953/142 = around 13.753521</output>

<result>E</result>
if a man lost 7 % by selling oranges at the rate of 21 a rupee at how many a rupee must he sell them to gain 42 %?
divide(multiply(subtract(const_100, 7), 21), add(const_100, 42))
"93 % - - - - 21 142 % - - - - ? 93 / 142 * 21 = 13.75 answer : e"