There are several oranges in a basket (the number is within 100), and the number of 3 and 5 are exactly counted. How many oranges are there at most in this basket?
一筐橘子有若干个(个数在100之内)，3个3个地数和5个5个地数都正好数完．这筐橘子最多有多少个？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<result>90</result>