Find the law and fill in the number. (1/2)(5/6)(11/12)(19/20) how much (41/42).
找规律填得数．(1/2)(5/6)(11/12)(19/20)多少(41/42)．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 - 1</gadget>
<output>29</output>

<gadget id="calculator">29 / 30</gadget>
<output>29/30 = around 0.966667</output>

<result>29/30 = around 0.966667</result>