During the New Year’s Day, the Xtep shoe store sold a pair of new shoes with a 10% discount. Wang Dong bought this shoe for 315 yuan. Help him calculate the original price
元旦期间特步鞋店打九折销售一双新鞋，王东买这款鞋花了315元，帮他算算原价多少元
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">315 / (9/10)</gadget>
<output>350</output>

<result>350</result>