请问 16 进制怎么转换成对应的浮点数或数字

已知数据

A = 0xa94026701502c9800
B = 0x2386f26fc10000

请问怎么将上面 A 和 B 的 16 进制转换为数字

A = 195.13264086
B = 0.01

谢谢各位大哥了.

 <?php

 $a = "0xa94026701502c9800";
$b = "0x2386f26fc10000";


$a_r = hexdec($a);

$b_r = hexdec($b);

echo $a_r . "," . $b_r;