The weight of an astronaut on the moon is lighter than that on the earth (5/6). An astronaut weighs 78 kilograms on the earth. How many kilograms does he weigh on the moon?
宇航员在月球上的体重比在地球上的体重减轻(5/6)，一位宇航员在地球上的体重是78千克，那他到了月球上体重多少千克？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">78 * (1/6)</gadget>
<output>13</output>

<result>13</result>