I bought 42 poplar saplings and 38 cypresses from the nursery, and 4 of them did not survive. What is the survival rate of these saplings?
从苗圃买来杨树苗42棵，柏树38棵，有4棵没有成活，这些树苗的成活率是多少？
<gadget id="calculator">38 - 4</gadget>
<output>34</output>

<gadget id="calculator">42 + 34</gadget>
<output>76</output>

<gadget id="calculator">42 + 38</gadget>
<output>80</output>

<gadget id="calculator">76 / 80</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>