Obviously, 9 squares can be placed with sticks, but how many hexagons can be placed with these sticks?
明明用小棒摆9个正方形，如果用这些小棒摆六边形的话，可以摆几个？
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">9 * (2/3)</gadget>
<output>6</output>

<result>6</result>