我快速计算了一下，看看我们是否负担得起。

I did a quick ___calculation to see if we could afford it.

只是一个简单的计算：大象在动物园的生活空间大约是500平方米。

Just a simple ___calculation: the living space an elephant has in a zoo is about 500m2.

工程师的计算显示桥梁可以承受这个重量。

The engineer's ___calculation showed that the bridge could support the weight.