A natural number is the continuous product of 2 2s, 3 3s and 2 5s. What is this number?
一个自然数，是2个2、3个3和2个5的连乘积，这个数是多少？
<gadget id="calculator">2 * 2 * 3 * 3 * 5 * 5</gadget>
<output>900</output>

<result>900</result>