garment factory receives a batch of orders for 300 pieces of clothing. If workshop A alone takes 8 days to complete, if workshop B alone takes 10 days to complete, if two workshops do this batch of orders at the same time, how many days can it be completed?
服装厂接到一批300件衣服的订单，如果A车间单独做需要8天完成，如果B车间单独做需要10天完成，如果两个车间同时做这批订单，多少天可以完成？
<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">1 / (9/40)</gadget>
<output>40/9 = around 4.444444</output>

<result>40/9 = around 4.444444</result>