It is known that 1176*a=b**4, a and b are natural numbers, how to find the minimum value of b?
已知1176*a=b**4，a、b是自然数，求b的最小值？
<gadget id="calculator">2 * 3 * 3 * 3 * 7 * 7</gadget>
<output>2_646</output>

<result>2_646</result>