It is understood that individual leather shoe stores can make a profit by selling leather shoes as long as they are 20% higher than the purchase price, but shopping malls often mark the price by 50% to 100% higher than the purchase price. And if you don't suffer a loss, how much can you bid at most?
据了解，个体皮鞋店销售皮鞋只要高出进价的20%便可盈利，但商场常以高出进价的50%至100%标价，如果你准备买一双标价400元的皮鞋，在商店盈利而自己又不吃亏的情况下，最多可出价多少元？
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">200 * (6/5)</gadget>
<output>240</output>

<result>240</result>