There is a bag of candies distributed to A, B and C, the ratio of the number of candies that A, B, and C get in turn is 5:4:3. If the candies are redistributed to A, B, and C so that the ratio is 7:6:5, one of them will get 10 more than the original amount. Find the number of candies this person originally received.
有一袋糖果分配给甲、乙丙三人，甲、乙、丙三人依次所得的糖果数目比是5：4：3．如果把糖果重新分配给甲、乙、丙三人，使其比依次为7：6：5，则其中一人会比原本所得的数目多10颗，求此人原本所得的糖果数目．
<gadget id="calculator">5 / 18</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/18) - (1/4)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">10 / (1/36)</gadget>
<output>360</output>

<gadget id="calculator">360 * (1/4)</gadget>
<output>90</output>

<result>90</result>