4. What is the sum of the counting units of the three numbers 3.21 and (3/8).
4、3.21和(3/8)三个数的计数单位的和是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + 0.01 + (1/8)</gadget>
<output>1.135</output>

<result>1.135</result>