Given that the number A=2*3*3*5*7, and the number B=2*2*5*5*7, find the greatest common factor of the two numbers A and B.
已知甲数=2*3*3*5*7，乙数=2*2*5*5*7，求甲乙两数的最大公因数．
<gadget id="calculator">2 * 5 * 7</gadget>
<output>70</output>

<result>70</result>