Get operands and perform the operation.

获取操作数并执行运算。

Fetches the required operands from the operand stack.

从操作数堆栈获取所需的操作数。

In postfix notation, the operator comes after its operands.

在后缀表示法中，操作符位于操作数后面。

In prefix notation, the operator is written before its operands.

前缀表示法中，操作符写在操作数的前面。

The solution is to cast one of the operands to its 64-bit type.

解决方案是将一个操作数强制转换成 64 位的类型。