It is known that the product of four numbers 14, 37, 75 and a is the square of a number, then what is the minimum value of a.
已知14，37，75和a四个数的乘积是一个数的平方，则a最小是多少．
<gadget id="calculator">2 * 3 * 7 * 37</gadget>
<output>1_554</output>

<result>1_554</result>