There is a flock of sheep on the grassland. The number of goats (2/3) is equal to the number of sheep (2/9). It is known that there are 72 goats. How many sheep are there?
草原上有一群羊，山羊只数的(2/3)与绵羊只数的(2/9)相等，已知山羊有72只，绵羊有多少只？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

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

<gadget id="calculator">72 * 3</gadget>
<output>216</output>

<result>216</result>