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Casts have higher precedence than binary expressions, so `(int) 0.5f * 100` is
equivalent to `((int) 0.5f) * 100` = `0 * 100` = `0`, not `(int) (0.5f * 100)` =
`50`.
To avoid this common source of error, add explicit parentheses to make the
precedence explicit. For example, instead of this:
```java
long SIZE_IN_GB = (long) 1.5 * 1024 * 1024 * 1024; // this is 1GB, not 1.5GB!
// this is 0, not a long in the range [0, 1000000000]
long rand = (long) new Random().nextDouble() * 1000000000
```
Prefer:
```java
long SIZE_IN_GB = (long) (1.5 * 1024 * 1024 * 1024);
long rand = (long) (new Random().nextDouble() * 1000000000);
```
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