此函数从请求中提取一个32位整数，并使用它中的算术运算来计算一个动态缓冲区的大小。

This function takes a 32-bit integer from the request, and USES it in an arithmetic operation that calculates the size of a dynamic buffer.

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它在各种各样的计算机系统上运行，尤其擅长于涉及任意长度整数和小数、图、矩阵和多项式代数的算术。

It runs on a variety of computer systems and is especially good at arithmetic involving arbitrary-length integers and fractions, graphics, and matrix and polynomial algebra.

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SIGFPE—算术异常、整数被零除或浮点异常。

SIGFPE - Arithmetic exception, integer divided by 0, or floating-point exception.

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