The combined age of father and grandfather in 1994 is 127 years old. Ten years ago, grandfather was 37 years older than father. When was grandpa born?
爸爸和爷爷1994年的年龄加在一起是127岁，十年前爷爷比爸爸大37岁，爷爷是多少年出生的．
<gadget id="calculator">127 + 37</gadget>
<output>164</output>

<gadget id="calculator">164 / 2</gadget>
<output>82</output>

<gadget id="calculator">1_994 - 82</gadget>
<output>1_912</output>

<result>1_912</result>