Delete digits after two decimal point without rounding its value in flutter?

var num1 = 10.12345678

What should i do with num1 to delete digits after two decimal point without rounding its value.
I need output as 10.12

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
      title: ' Delete digits after two decimal point ',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: MyHome(),
    ));

class MyHome extends