Wang Hong collected 45 stamps, less than Li Ming (2/7). How many stamps did Li Ming collect? (column equation solution)
王红收集邮票45枚，比李明少(2/7)．李明收集邮票多少枚？(列方程解答)
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">45 / (5/7)</gadget>
<output>63</output>

<result>63</result>