There is a formula 9*8*7*6*5*4*3*2*1. Xiao Ming replaced some "*" with "/" in the above formula, and the calculation result is still a natural number, so what is the smallest natural number?
有一个算式9*8*7*6*5*4*3*2*1．小明在上式中把一些"*"换成"/"，计算结果还是自然数，那么这个自然数最小是多少？
<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">5 / 4 / 3</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">9 * 8 * (7/6) * (5/12) * 2 * 1</gadget>
<output>70</output>

<result>70</result>