A piece of red cloth is 1 meter long and a piece of white cloth is (6/9) meters shorter than it. How many meters is the length of the white cloth?
一块红布长1米，一块白布比它短(6/9)米，白布长多少米？
<gadget id="calculator">6 / 9</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>