To build a road from Jiangyin to Wuxi, engineering team A alone will take 8 months to complete the repair, and engineering team B will complete the repair alone in 10 months. If the two teams work together, the road can be completed in a few months (9/10) ? How many.
修一条江阴通往无锡的公路，甲工程队单独修要8个月完成，乙工程队单独修要10个月完成，两队合修，几个月能完成这条公路的(9/10)？多少．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) + (1/10)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">(9/10) / (9/40)</gadget>
<output>4</output>

<result>4</result>