The Canadian poplar seedlings growing in the north can grow up to 3m in a year, which is the growth rate of the seedlings of the flower group in Guangxi (6/7), and the growth rate of the balsa seedlings in South America is the growth rate of the flower group seedlings. Speed (8/7), how many meters can the balsa seedlings growing in South America grow in a year?
生长在北方的加拿大杨幼苗一年可以长高3m，是生长在广西地区花团树幼苗生长速度的(6/7)，生长在南美洲的轻木幼苗的生长速度是花团树幼苗的生长速度的(8/7)，生长在南美洲的轻木幼苗一年能长多少米？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">3 / (6/7)</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">8 / 7</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">(7/2) * (8/7)</gadget>
<output>4</output>

<result>4</result>