Wrong output on 10.2 - Prompt Engineering Interactive Tutorial

[TomasCImach]

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This doesn't work properly, tried a few times (with temp = 0) and it always returned:

<function_calls>
<invoke name="calculator">
<parameter name="first_operand">5</parameter>
<parameter name="second_operand">3</parameter>
<parameter name="operator">+</parameter>
</invoke>