Overflow in serial.print

Dear friends,
L faced a strange problem in Arduino, and at the end I find that


prints :
I find this happens for all answers greater than 32,767 which is the MAX range of "int" variable !
what the problem ?
and how can I solve it ?

to make it a unsigned long

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Serial.println(1 * 60 * 1000UL);
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Great !
You solve the problem,
Thanks a lot

BTW this is nothing to do with print. Its because ints are 16 bit unless you cast to long.

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