The longest river in the world - the Nile River is 6,670 kilometers long, and the Yangtze River is 297 kilometers longer than the Nile River (9/10). How many kilometers is the Yangtze River's total length?
世界第一长河--尼罗河全长6670千米，长江比尼罗河的(9/10)还长297千米，长江全长多少千米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">6_670 * (9/10)</gadget>
<output>6_003</output>

<gadget id="calculator">6_003 + 297</gadget>
<output>6_300</output>

<result>6_300</result>