[Tistron]

I think of it slightly differently, but it's basically the same:

In many germanic languages we say half-four when the time is half past three, where brits these days sometimes say half-three, to make it maximally confusing. I.e. we have an implied "half [to]" and they "half [past]". This way of counting is what the Danes do. "Half-four times twenty" is "a half before four, times twenty" is "3.5 x 20" is 70 is "halvfjerdsindtyve" is "halvfjerds".

But it is only confusing to think of it that way, to speak Danish you have to just learn it as an opaque pointer to 70, or you'll get stuck doing mental arithmetic every time they say a number.