Fill in the appropriate number in □5□ so that the three-digit number can be divisible by 3 and 5 at the same time. How many ways are there?
在□5□在中填上适当的数，使三位数能同时被3和5整除，共有多少种填法．
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<result>6</result>