A kind of children's shoes is priced at 46 yuan after a price increase of 15%. What is the purchase price of this kind of children's shoes?
一种童鞋，加价15%后的定价是46元，这种童鞋的进价是多少元．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">46 / (23/20)</gadget>
<output>40</output>

<result>40</result>