He was able to gain a large profit from a small investment, it was like catching a sea bream with a foot ruler.

He used the strategy of 'throw a sprat to catch a mackerel' to gain a large profit from a small investment.

He was able to make a large profit with a small investment. It's exactly what they mean by 'catching a sea bream with a shrimp'.

His story is entirely like a novel.

He has a small amount of money.

He solved the problem in a small amount of time.

There is only a little time left.

He owns a big house.

He solved the problem in just a short time.

I often fish in the river on weekends.