The fruit shop brings in 100 kilograms of fruit, of which apples account for (1/5), pears account for (1/8), oranges account for (4/9), and the rest are mangosteen. Please ask 3 math questions and answer them.
水果店运进水果100千克，其中苹果占(1/5)，梨占(1/8)，橘子占(4/9)，其余的是山竹．请你提出3个数学问题，并解答．
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">100 * (4/9)</gadget>
<output>400/9 = around 44.444444</output>

<result>400/9 = around 44.444444</result>