person has three stamp collections, (1/5) of all stamps is on the first book, ((n)/7) is on the second book, and there are 303 stamps in the third book. How many stamps does he have in total?
某人有三本集邮册，全部邮票的(1/5)在第一本上，((n)/7)在第二本上，第三本上有303张，他共有邮票多少张．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">28 - 25</gadget>
<output>3</output>

<gadget id="calculator">303 / 3</gadget>
<output>101</output>

<gadget id="calculator">35 * 101</gadget>
<output>3_535</output>

<result>3_535</result>