Two people, A and B, start from two places at the same time and walk toward each other. A can complete the journey in 8 hours, and B can complete the journey in 10 hours. When the two meet, how much of the journey has A completed?
甲乙二人同时从两地出发相向而行，甲8小时可以行完全程，乙10小时可以行完全程，两人相遇时，甲行了全程的几分之几？
<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>

<gadget id="calculator">(40/9) * (1/8)</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>