How many eight-digit numbers with at least 3 consecutive 1s can be formed by using 1 or 2.
用1或2可以组成至少有连续3个1的八位数共多少个．
<gadget id="calculator">6 * 2 * 2 * 2 * 2 * 2</gadget>
<output>192</output>

<result>192</result>